Chill out. I'm a freshman too and I have some similar classes to you: algebra 2, biology, and honors English. They're not too bad. (I know because I've already started school.) You'll be fine.
You'll be fine, trust me. I took advanced algebra 2 in eighth grade and it was a piece of cake. Marching band and foods doesn't seem very hard, and I'm also taking honors English and honors bio as a freshman.
Eng and Bio Hon will be easy if you do the work. You shouldnt really need to study for them (unless its before a big test.) I'm taking Alg II Hon right now over the summer as a rising sophomore, and at the speed it is during summer, it's somewhat difficult, but during the normal school year it shouldnt be too bad. I took spanish and it was pretty easy (it's easy to figure out fill in the blanks with common sense) so the same should apply to mandarin. Food seems like a blowoff class, and although after taking middle school band I question your sanity for wanting to be in band (jk haha), it's usually just playing tests and participation if I'm correct? Good luck
